Pump construction



March 7, 1933. s. DEAN 1,900,228

' PUMP CONSTRUCTION Filed March 50, 1951 2 Sheets-Sheet l m/wi/ I N VENTOR.

, 57'U/IKT 1754M BY ATTORNEYfi.

March 7, 1933. s. DEAN PUMP CONSTRUCTION 2 Sheets-Sheet 2 Filed March30, 1931 INVENTOR. 57-02%? Bar/v.

ATTORNEY 61 r Patented Mar. 7, 1933 3 UNI ED STATES jf P A TENT OFFICESTUART DEAN, OF INDIANAFOLIS, INDI'ANA, ASSIGNORY T0.1)EAN BROTHERS(30., OF INDIANAPOLIS, INDIANA, A CORPORATION PUMP coivsrnucrronApplication filed March 30,4931. Serial No.-526',272.

This invention relates tothe liquid sealing of vertical pumps. I

pump. p I One feature of the invention consists in positioningat. ahigher elevation than heretofore positioned, the suction Valve orvalves. Another featureof the invention consists in liquid sealing thedischarge valves'whereby they will not be drained dry should the pump attimes handle nothing but air or air and water.

. A further feature of the invention consists in the priming valvearrangement which may also serve as a drain.

The full nature of the invention will be understood from theaccompanying drawrings and the following description: and

claims -In the drawlngs, Fig. 1 1s a vert cal sectional View through aportion of a vertical pump showing one form of elevated suction valve,one form of liquid retainlng dam for combination dram Fig. 2 is asimilar viewto illustrate the dam construction. r I r r H I Fig. 3 is ahorizontal sectional view through the discharge valvecover,"illustrating the dam in detail. v 1 V Fig. 4 is a view similar toFig. 1 but of a modified form of elevated intake suction valve and amodified form of dam construction.

Fig. 5 is a plan view of the discharge valve elevating deck with the damillustrated in detail and is taken on line 5 5 of Fig. 3.

y I In Figs. 1 to 3, inclusive, there is illustratedan upright orvertical pump adapted to;

handle liquid, such as water, and which at times may handle part waterand part air and which at some time or other, may handle only air whilesupposedly pumping wa-.

ter. 1 I

In the drawings, 10 indicates the usual air dome employed with pumps ofthis character and said dome communicates" with the discharge chamber 11formedin the discharge 1 head' 12. :The discharge headz12 11318112110common discharge outlet 13.and formed in said head in -the presentinvention is axvertica-lupartition 14,"herein .termed the dam.The-headin the present instance does not include the discharge valvedeck but the same is formed in the casting 15 which alsoin- Z cludes aregistering outlet 16. The horizontal portion 17 of thedeck includes thedischarge ports 18. For each port is a discvalve 19 slidably supportedby a stem 20 carried bythe spider portion 21 in the valveopening or port18. Said stem 20 adjustably mounts a spring retainer 22, against whichbears one end of a spring 23 which normally retains the valve in seatedposition and closes the-opening or port 18. m p

. The main pump body is indicated at 25 and dependingfrom anoverheadseat portion 26 therein is the cylinder and liner 27 *Mountedthereirris the piston 28 carried by the piston ro-d29 that passesthrough the gland construction 30. and is reciprocated by any suitablemechanism. The pump body 25 .in-

cludesran overhead chamber 31 and hereinthe pump body is formedseparatefromthe valve supporting portions. The valve supporting body 32 includesan upwardly inclined passage 33-;which communicates with the chamber 31.H i Y FOr liner insertiomthereiis provided'the opening 34: in, the upperportion ofthe body .25.; A cap 35 is suitably secured "as at 36 to thebody 25. The cap 35 supports the holddown -studs 37 which terminateat'one' end in bearing members 38 that bear upon the flange of linercylinder 27 and maintain the same upon the seat 26in the main'body ofthe casting and the other ends mount cap nuts 370 .which Bear.on-sealing ring-gaskets 35a. :In order to reduce the chamber volume,the hold down studs may support an aligning disc and plug 39.

The valve supporting body includes'the upwardly inclined passage 33which communicates with the overhead chamber 31, terminates in a chamber40,-the lowerportion :of which, is apertured at 11 to form an intakeport. The intake port mounts the spider construction 42 similar to thespider construction 21 and the stem 43 carried thereby supports thespring retainer 44 and interposed between the intake disc valve 45 andsaid retainer 44 is the spring 46. The chamber 47 which communicateswith the chamber through the intake port 41 communicates with theliquid. supply source to which the pump is attached.

As the piston moves down in the upper part of the liner cylinder, itcreates a suction which seals the discharge valve 19 and opens theintake valve and this pull permits the liquid and air or either of them,to enter the chamber 40. Upon the return and upward stroke of the piston28, the liquid collected in the overhead chamber and passages 40-, 33and 31 is discharged through the exhaust valve for pressure appliedthrough the spring and the piston 28 seats the intake valve so that theliquid and the air discharge into the discharge chamber 11. The airpasses upwardly through the opening 50 into the dome 10 and the surplusliquid flows over the dam 14 to the discharge passages 13 and 16.

As a result of the aforesaid construction, there is trapped in the pumpbetween the intake and discharge valves a large body of liquid therebyincreasing the etliciency and effectiveness of the pump. This is becausethe air volume in this portion of the device is reduced to a minimumsince the trapped liquid in the passage 33 and chamber 31 displaces thatamount of air which heretofore has always collected therein and has beenhandled at each reciprocation of and by the pump piston with a resultingdecrease in the performance or eflicency of the pump.

Briefly expressed, the offsetting or upward inclination of passage 33results in an effect equal to the reductionof the zero air volume.

The liquid initially discharged through the discharge valves collectsabove. said valves and said valves operate in a bath of liquid,

said liquid being retained by the dam. In

other words, the liquid behind the dam 14 is effective to seal thedischarge valves during the intake stroke of the piston. In this manner,the eirlciency of the pump is increased upon the intake stroke.

As shown clearly in Fig. 1, the discharge valve deck casting 15 includesa passage which leads from the upper face thereof to a downwardlyinclined drilled and tapped opening 61 that extends from the chamberbeneath the deck to the exterior of he casting. A threaded bolt 62having'the head 63 is mounted therein and bears upon a gasket 64 that inturn bears against a counterbored portion 65 of the casting. Bolt 62closes passage 60.

For initial priming of the pump, the bolt 62 may be removed and liquidsupplied to chamber 31 and passage 33 to the desired level, then thebolt may be screwed down and when it does, it completely closes the port62 and cuts off the bypass between the intake chamber 40 and thedischarge chamber 11 through passage 60.

After installation and when the pump is intermittently operated, theliquid trapped by the dam may be released by backing out for a portionof the distance, the bolt 62, thereby permitting the liquid trapped bythe dam in the discharge chamber to escape through passage 60- and theportion of the threaded opening 61 that communicates with the intakechamber, thereby priming the intake chamber. After this priming, thebolt 62 is reseated and this substantially cuts off any furtherdischarge through port 60. Should there be any leakage through thisconnection, the same will be very small and has no serious effect so faras the efliciency of the pump is concerned. I

The lowest point of the intake chamber includes a drain port 59 closedby a plug 58. Likewise, the liner cylinder is liquid sealed as at 55 andfor drainage, there is provided the passage 56 closed by a plug 57 InFigs. 4 and 5 there is illustrated a modified form of the invention andthis form of the invention is illustrated as an adaptation of a standardpump. In this form of the invention, the equivalent action is obtainedby elevating the intake valve instead of employing an offset passage,such as shown at 33 in Fig. 1.

To accommodate the elevated inlet valve, the deck for the dischargevalve is positioned in an elevated position and in the present form ofthe invention, instead of the dam being formed in the discharge head,the same is formed in the discharge deck member. In this form of theinvention the discharge valves are sealed by the liquid trapped by thedam. The combination priming valve and bypass drain construction is alsoillustrated in this form of the invention. The operation of this form ofthe invention is substantially identical to that previously set forthrelative to the embodiment illustrated in Figs. 1 to 3, inclusive. InFigs. 4 and 5, like or similar parts are indicated by numerals of theone-hundred series.

In this form of the invention, the spider 142 is provided with anintegral depending wall which forms the elongated passage 140. This wallhas threaded engagement 191 with partition 141.

With this construction reduction in zero air volume, liquid sealing,priming and draining all can be accomplished in a modification of astandard pump, i. e. by replacing the standard valves and spider-seeFigs. 1'

and 2by the skirted or walled spider 142.

The invention claimed is 1. In a pump, the combination of an intakechamber having an intake port therein, an intake valve for the port,means detachuation of said chamber and into which the intake valvestructure projects.

2. In a pump, an intake chamber, a dis charge chamber, a discharge valvesupporting partition therebetween, a passage leading downwardly from thedischarge chamber, a passage leading outwardly from the intake chamber,said passages. communicat- Q mg with each other, one of said passagesbeing extended for exterior exposure and the extension being plugseatable in the extension control purposes and removable purposes.

In witness whereof, I have hereunto affixed my signature.

STUART DEAN.

for passage for priming threaded, and a threaded

